I’ve been unable to find anything about any of Poteau’s theaters in Boxoffice, but a Mr. O.K. Kemp of Poteau is mentioned twice in 1954. In June he visited Film Row in Oklahoma City, and in December he was re-elected as a director of the Theatre Owners of Oklahoma.

A snippet of a 1940 Motion Picture Herald item from Google Books mentions a W.O. Kemp in connection with the Victory Theatre at Poteau.